What are the symptoms of error code Ub?

Washer shakes or vibrates excessively, Spin cycle does not complete, Washer repeatedly tries to rebalance the load, Washer stops mid‑spin with Ub displayed, Clothes remain wet at the end of the cycle

What causes error code Ub?

Single heavy item causing imbalance, Mixed load types (e.g., towels with light fabrics), Washer not level on the floor, Laundry tangled into a ball, Shock absorbers worn or weakened

How do I fix error code Ub?

Redistribute the laundry evenly inside the drum., Add one or two additional items when washing a single heavy garment., Ensure the washer is level using the adjustable feet., Untangle twisted or balled‑up laundry., Restart the spin cycle after correcting the imbalance.

Samsung Washer - Ub Error Code

Unbalanced load detected during spin.

Meaning

Unbalanced load detected during spin.

The Ub error indicates that the washer has detected an unbalanced load during the spin cycle. Samsung explains that this occurs when laundry is unevenly distributed, when a single heavy item is washed alone, or when the washer is not level. The washer attempts to rebalance the load automatically, but if it cannot achieve stable rotation, it stops spinning to prevent excessive vibration and mechanical damage.

Symptoms

Washer shakes or vibrates excessively
Spin cycle does not complete
Washer repeatedly tries to rebalance the load
Washer stops mid‑spin with Ub displayed
Clothes remain wet at the end of the cycle

Causes

Single heavy item causing imbalance
Mixed load types (e.g., towels with light fabrics)
Washer not level on the floor
Laundry tangled into a ball
Shock absorbers worn or weakened

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Step-by-Step Fixes

Redistribute the laundry evenly inside the drum.
Add one or two additional items when washing a single heavy garment.
Ensure the washer is level using the adjustable feet.
Untangle twisted or balled‑up laundry.
Restart the spin cycle after correcting the imbalance.

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Safety Notes

Do not continue running the washer if it vibrates violently.
Avoid washing single heavy items alone.
Unplug the washer before adjusting leveling feet.

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Applicable Models

Show Models

5000 Series: WW25FG5B34BEAC

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Other Samsung Washer Error Codes

Show All Error Codes

Model-Specific Notes

The WW5000F/B700 platform automatically drains for 3 minutes when 4C or related water-supply errors appear, and the power button is disabled during this period.

Disclaimer

The information provided on this page is for educational and informational purposes only. Repairs involve electrical, mechanical, and water-related risks. Always follow manufacturer instructions and consider contacting a qualified technician for diagnosis or repair.